Environment Minister Jim McGinty says that while people are hailing last night's Skyshow in Perth as an outstanding success - the amount of litter left behind is a real concern.
Mr McGinty said the annual fireworks display was an extremely well-organised annual event, but people who lined vantage points around Perth to view the spectacle needed to be more conscious of clearing up after the event.
"I am sure most people do the right thing and place their rubbish in the bins provided or if necessary take it home with them," Mr McGinty said.
"However, I deliberately drove through Kings Park today to check on the amount of litter and I was extremely disappointed at the piles of rubbish just left lying around in such a beautiful setting.
"Much of the rubbish - such as aluminium cans - was recyclable and should not have been discarded in the first place."
Mr McGinty said the Skyshow was a great event - but people had to be more careful and think about the way in which they disposed of their litter after enjoying the entertainment.
"There is no doubt that people are becoming more environmentally aware, but this highlights the fact that more work has to be done," he said.
"That is why the Lawrence Government is committed to introducing an environmental education curriculum for all Western Australian schools by the start of next year.
"The more we know about the environment the less likely we are to do things which will harm it."